Mercedes-Benz 180 / 190, W120/121 (Ponton) (EU)

Additional Notes

• The Mercedes-Benz 180 / 190, W120/121 (Ponton) cooling system specifications cover two distinct capacity values across the model range: 9 liters and 10.3 liters, depending on the variant.
• The 180 (W120, 1953-1957) and 180 a/b/c (W120, 1957-1962) both carry a 9-liter cooling system capacity, placing them in the lower tier of the two capacity figures recorded across the lineup.
• The 180 Dc (W120, 1961-1962) is rated at 10.3 liters, a notably higher figure than the earlier and concurrent 180 variants sharing the same W120 body series, reflecting a difference tied to the diesel engine fitted to the Dc designation.
• The 190 D (W121, 1958-1959) and 190 Db (W121, 1959-1961) each carry a 10.3-liter cooling system capacity, consistent with the figure seen in the diesel-engined 180 Dc rather than the petrol 180 variants.
• A 10.3-liter cooling system capacity, as seen in the diesel variants, generally indicates a larger total fluid volume circulating through the engine block, cylinder head, and radiator, which is characteristic of diesel engines that produce more heat rejection under normal operating loads.
• All five configurations are specified under normal use conditions, meaning the capacities listed represent standard operating fill volumes rather than figures adjusted for severe-duty or high-load service scenarios.
• The 9-liter capacity shared by the 180 (1953-1957) and 180 a/b/c (1957-1962) spans a combined production window of nearly a decade, with no variation in cooling system volume recorded across that period despite the model designation changes from 180 to 180 a, b, and c.